Revert "Avoid duplicate languagesettings dialog in page source"

This reverts commit 3b2e39d8224dbe00345142d69f1575478c5bcf8f.

Because of that commit input settings cannot be opened from
the IME menu and from the buttons at the bottom of ULS.

Change-Id: I9aee4f40d39392df0cdc5aba8b481b71838dc41a